Well that's an interesting point for sure.
Darth Maul
Bib Fortuna
Salacious Crumb
Jabba the Hutt
Endor Troops
Yavin Luke
Leia Boushh
Now, that's going by figures that are out and in hands. In my opinion, Jabba is hands down the best thing since Maul, yet not a true "figure", and there have only been a small handful of figures since Maul. Bib, while minimal in appearance, was a very well made piece, equal to Boushh. Luke was, well we won't open that, and the Troops were well made but not the most popular character choice.
Regardless of measuring Boushh against the others, it looks fantastic, and in my opinion, is equal to or in areas, better than the proto.